Contents

module.exports = function School() {
  var db = {};

  function add(student, gradeLevel) {
    if (db[gradeLevel]) {
      db[gradeLevel].push(student);
    } else {
      db[gradeLevel] = [student];
    }
  }

  function grade(level) {
    return db[level] ? clone(db[level]).sort() : [];
  }

  function roster() {
    return sortedGrades().reduce(function (sorted, gradeLevel) {
      sorted[gradeLevel] = clone(db[gradeLevel]).sort();
      return sorted;
    }, {});
  }

  function sortedGrades() {
    return Object.keys(db).sort();
  }

  return {
    roster: roster,
    add: add,
    grade: grade
  };
};

function clone(array) {
  return array.slice();
}

Version data entries

68 entries across 68 versions & 1 rubygems

Version	Path
trackler-2.2.1.180	tracks/javascript/exercises/grade-school/example.js
trackler-2.2.1.179	tracks/javascript/exercises/grade-school/example.js
trackler-2.2.1.178	tracks/javascript/exercises/grade-school/example.js
trackler-2.2.1.177	tracks/javascript/exercises/grade-school/example.js
trackler-2.2.1.176	tracks/javascript/exercises/grade-school/example.js
trackler-2.2.1.175	tracks/javascript/exercises/grade-school/example.js
trackler-2.2.1.174	tracks/javascript/exercises/grade-school/example.js
trackler-2.2.1.173	tracks/javascript/exercises/grade-school/example.js
trackler-2.2.1.172	tracks/javascript/exercises/grade-school/example.js
trackler-2.2.1.171	tracks/javascript/exercises/grade-school/example.js
trackler-2.2.1.170	tracks/javascript/exercises/grade-school/example.js
trackler-2.2.1.169	tracks/javascript/exercises/grade-school/example.js
trackler-2.2.1.167	tracks/javascript/exercises/grade-school/example.js
trackler-2.2.1.166	tracks/javascript/exercises/grade-school/example.js
trackler-2.2.1.165	tracks/javascript/exercises/grade-school/example.js
trackler-2.2.1.164	tracks/javascript/exercises/grade-school/example.js
trackler-2.2.1.163	tracks/javascript/exercises/grade-school/example.js
trackler-2.2.1.162	tracks/javascript/exercises/grade-school/example.js
trackler-2.2.1.161	tracks/javascript/exercises/grade-school/example.js
trackler-2.2.1.160	tracks/javascript/exercises/grade-school/example.js